Pink was then admitted to St Vincents Hospital on Sunday night due to dehydration. After being treated and discharged, the singer was readmitted on Monday and diagnosed with a gastric virus.

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Monday night's show was subsequently cancelled, with some fans finding out while making their way to the concert. The So What singer spent the night in hospital and is due to be reassessed by doctors today.

Singing superstar Pink kicked off her Australian tour in Perth - catch her last two shows this weekend.Credit:AAP

Live Nation says it will update fans when more information comes to hand. The tour promoter is scrambling to reschedule the string ofpostponed shows.

Pink turned to social media last week to vent her frustration at having to can the gigs.

Over the weekend, she took to Instagram to slam News Corp for publishing a photograph of her lying on a beach in Byron Bay.

"What these paparazzi don't show you is two doctor visits in Byron on two consecutive days, antibiotics, steroids, Vick's, nose spray, throat spray, more steroids... a screaming baby in the middle of the night," she wrote.

"You can think whatever you want, it's your right, but I have never taken advantage of anyone in my entire life. I have never f---ed off while disrespecting hard-working people who spend money to come see me play. I have an impeccable record for not cancelling."